Stream Sediment, Float, and Bedrock Sampling in the Porcupine Mining Area, Southeast Alaska.
The Bureau of Mines in 1983 collected stream sediment, float, and bedrock samples in the Porcupine Mining Area near Haines in southeastern Alaska. The samples were collected for possible indications of massive sulfide mineralization similar to that found at the world class windy craggy copper-cobalt-gold deposit near the United States-Canadian border, 50 miles to the northwest. Such indications were found at several locations. Samples collected in the Mosquito Lake vicinity contained up to 360 ppm pb, 210 ppm CO, 0.033 Ppm au, and 1.437 Ppm ag; samples collected in the Porcupine Road vicinity contained up to 1,300 ppm zn, 280 ppm pb, 100 ppm CO, 0.092 ppm au, and 1.437 Ppm ag; samples collected at scattered locations between the Tsirku River and Jarvis Glacier contained up to 770 ppm zn, 1,400 ppm cu, 310 ppm pb, 310 ppm CO, 0.186 Ppm au, and 3.686 Ppm ag. Also, a sample collected in Little Boulder Creek contained 870 ppm zn, 400 ppm cu, and 100 ppm pb while a sample collected in Muncaster Creek contained 1,500 ppm cu, 360 ppm CO, 0.165 Ppm au, and 1.881 Ppm ag.